not kidding...before you toss out your changer - hit it hard a couple of times on the top with your fist. I did that to mine, the error message went away, and I've had no problems for 7 months now. Read about this on another website...so I'm not the only one who's benefitted from this.
<span style='color:green'>1994 325i </span>- - - 75,000 mi.
No mods - - - very happy as is!
<span style='color:green'>1995 525i </span>- - - 154,000 mi.
No squeaks or rattles... unreal!